I have had good experience with Michelin tires, but don't know anything about the X Ice 2.

I am running the Dunlop Wintersport M3 and I am very happy with them. Dunlop now has the Wintersport 3D as well, and they are reported to be very similar. I bought two sets of four Blizzak LM60 snow tires for our two daughter's FWD vehicles last year. They perform very well, but I don't have any information on tire life yet, it is too soon.

__________________
2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue